Click on it and select “Connect to the database”.Ĭongratulations! You now have a database. If you successfully created a database, you should see it in the left-hand “Databases” window. Here I saved my “testdb” to a folder called “SQLite_Tutorial”, which is on my desktop.
#Sqlitestudio multiple primary keys download
In the window that pops up next (the right one below), give your database a name (mine is “testdb”) and make sure it is saved to a folder that is outside of the SQLiteStudio download folder. In the next window that appears (the left one below), click on the green “+” to create a new database. To create a database, click on “Database” then “Add a database”. Once you open SQLiteStudio, you should see this interface: For Windows, try right click then “Open”.
#Sqlitestudio multiple primary keys for mac
If there is no “Open” button, for Mac users, try holding “control” when you click and then select “Open” from the menu that appears. When you double click the SQLiteStudio icon (shown below), the dialog box that opens should give you the choice to open the application. If not, select it from the options below.įollow the download prompts. The correct version for your operating system should appear at the top. Now that you know the basics, we’re going to jump right in and start building a database.įirst, you need to download SQLiteStudio, the database manager we’ll be using for this tutorial. SQLite also has a command-line utility, but since this tutorial is an introduction, we’ll be using SQLiteStudio. There are a couple options for SQLite GUI database mangers, including SQuirreL SQL Client and SQLiteStudio. The database holds your data, but you need a client to see and interact with it. db files that you can store anywhere on your computer. The databases you work with in SQLite exist in. SQLite is a little different from other implementations of SQL because it operates on regular plain old local files and does not require a server connection, unlike PostgreSQL and MySQL. We’re going to use SQLite in this tutorial because getting set up requires less work. Different implementations (such as PostgreSQL and MySQL) have their own higher level specialized functions, but the all handle the same basic operations covered in this tutorial. There are different implementations of SQL-one implementation is SQLite. SQL (Structured Query Language) is a programming language for interacting with data in a relational database. In a relational database, the data is contained in different tables. There are different kinds of databases-one kind is a relational database. If you don’t have a chance to check out Keith’s post, here are the short answers to a couple questions that you may be asking yourself: What is a database?Ī database is a collection of data that is structured to allow for manipulation. Before continuing here, I highly recommend reading Keith’s post Databases for Smart People Who Are Scared of Databases for a helpful conceptual overview of the what and why of databases. This tutorial is based on the recent SQL workshop hosted by the Digital Fellows, and is designed to get you started using relational databases. Here is the syntax to define ID attribute as a primary key in a COMPANY table.Image by Willow Brugh (database skillshare relational), via Wikimedia Commons The Basics Note: You would use these concepts while creating database tables. If a table has a primary key defined on any field(s), then you cannot have two records having the same value of that field(s). When multiple fields are used as a primary key, they are called a composite key. A primary key column cannot have NULL values.Ī table can have only one primary key, which may consist of single or multiple fields. A primary key is a field in a table which uniquely identifies the each rows/records in a database table.
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